RAVPower’s 26800 Portable Charger lets you charge 3 devices simultaneously, and it’s being offered for $39.99 shipped, today only, originally $61.99. It’s perfect for trips, thanks to its auto-adjusting current and voltage with iSmart 2.0 and Panasonic Smart IC frequency technology. Want to know how much power is left? Just press the Power Button to keep track of your battery life with indicators in 25% increments. Product page. Read more for another video review and additional information.

“This portable charger saved me during fieldwork in remote parts of Africa. It can charge off of many different kinds of solar setups and a car battery inverter. It does not charge quickly, but the amount of charge it holds is well worth the long charging time. I used it to recharge two different kinds of tablets – an old ASUS that is probably not even being sold any more, and a Surface 3. In both cases the charger was able to charge the tablet at the same time the tablet was running,” said reviewer Cello on Amazon. More information.